[rocm-libraries] ROCm/rocm-libraries#8519 (commit 9637390)

feat(ck-tile): add block-scale GEMM operators (aquant,
 bquant, abquant) (#8519)

JIRA ID - AICK-1289
Motivation
Adds three new block-scale quantized GEMM operators to the CK Tile
Engine for FP8/BF8 inference workloads.

Technical Details
gemm_aquant: A-matrix quantized GEMM with per-row-group scale tensor [M,
K/group_size_k]
gemm_bquant: B-matrix quantized GEMM with per-column-group scale tensor
[K/group_size_k, N]
gemm_abquant: Both A and B quantized with independent group-scale
tensors
Each operator includes CMakeLists, Python instance builder with tier
sampling, C++ benchmark/profiler with host reference verification, and
config JSONs. Supporting changes to gemm_instance_builder.py,
gemm_validation_utils.py, sampling infra, and the operation support
matrix.

Test Plan
 Build and run all three operators with fp8/bf8 on gfx942/gfx950
 Verify correctness against CPU reference
 Verify CI config builds pass